6978538 has 8 divisors (see below), whose sum is σ = 11963232. Its totient is φ = 2990796.

The previous prime is 6978511. The next prime is 6978547. The reversal of 6978538 is 8358796.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a d-powerful number, because it can be written as 6⁷ + 9⁶ + 7² + 8⁷ + 5⁹ + 3⁹ + 8⁷ .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249220 + ... + 249247.

It is an arithmetic number, because the mean of its divisors is an integer number (1495404).

Almost surely, 2^6978538 is an apocalyptic number.

6978538 is a deficient number, since it is larger than the sum of its proper divisors (4984694).

6978538 is a wasteful number, since it uses less digits than its factorization.

6978538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498476.

The product of its digits is 362880, while the sum is 46.

The square root of 6978538 is about 2641.6922606541. The cubic root of 6978538 is about 191.0974165667.

The spelling of 6978538 in words is "six million, nine hundred seventy-eight thousand, five hundred thirty-eight".